Elastic-fluid turbine.



PATENTED DEC. 31 m 0. G. CURTIS. ELASTIC FLUID TURBINE.

APPLICATION FILED 13110.3, 1903.

In V6 22 tor Mar/wfluriz, 4% W FL CHARLES G. CURTIS, OF NEW YORK, N. Y

ELECTRIC Applica T 0 all whom it may concern:

Be it known that 1, CHARLES citizen of the United States,

new and useful ASSIGNOR, BY/MESNE ASSIGNMENTS, TO GENERAL ooMrANY, A CORPORATION or NEW YORK.

ELASTIC-FLUID TURBINE.

Specification of Letters Patent.

tion filed December 3.1903. Serial No. 183,597

C. Cun'rrs, a residing in the i New York,

l a certair 1 Elastic- Fluid Turbines, of which the following is a description.

The object e'l'l'ective means of my invention is to supply an or converting the pressure component of the residual energy remaining in the elastic fluid after able vanes into velocity and ad velocity component so as to se creased velocity at the point the elastic fluid to the next vanes. This I accomplish acting upon the movling it to the cure an inof delivery of set of moving by making the intermediate vane spaces without contractlon in their cross-sectional area until the direction of flow has been reverse 'tractingthe vane spaces at throats; the space beyond d, and conthis point to form extending in straight lines to their discharging ends and forming, with the throats and larger anterior chambers, nozzles in which the pressure cornponent is changed into velocity and is added to the velocity component.

The same ture of construction may' also be applied to moving vanes.

similar view of movable and intermediate construction vanes, showing the principle ol applied to both kinds of vanes; and Figs. 3, l and 5 are diagrams showing in outline the shape ol" the spaces on radial centrally through the spaces.

Nith reference to Fig. tions of an expansion sectional O are sets of movable vanes, am

intermediate stat ionary va nos.

sections taken 1 A represents secnozzle, 13 and and the movable vanes aro ol the tion well understood in oonnoction with my elastic llnid turbines. mediate vanes l) have the tween their lorward and Your walls (I. o

'lho slatioi same distansm l)o l l is a set ol ho nozzle. construc- "V interuntil the diroction ol' the llnid column is charged, when those \mlls approach each ol ln-rrapnlly, beginning at tho pomt r, and rr-nrh a nnn|- to the end of the space tho walls llel sides a and lorin, with re 1 which J aralio tho Patented idea. 31, 1907.

throat c, d and the anterior bowl produced by the larger vane space, a nozzle for converting pressure into velocity. The residual energy 111 the elastic fluid when discharged from the moving vanes B is made up of velocity and pressure components. The pressure component is converted into velocity by the nozzle action of the intermediate vanes, this velocity being added to the velocity component of the residual energy and increasing the velocity of the fluid jet and making its action more effective upon the second set of movable vanes (l. l

The same principle of construction may be applied to the movable vanes, as well as the intermediate vanes, as illustrated in Fig. 2, in which B C are the movable vanes and D the intermediate stationary vanes. The top and bottom walls of the vane spaces may diverge slightly as shown in Fig. 3, or be arallel as shown in Fig. 4:. c, (Finay be produced by drawing inwardly the top and bottom walls as illustrated in Fig. 5, or the contraction may be made partly by the convergence of the side walls and partly by the convergence of the top and bottom walls.

What I claim is: 1

1. An elastic-fluid turbine having a wheel provided with buckets, such buckets having their inlets of greater area in cross-section than their outlets, and an expansion-nozzle arranged to deliver the elastic fluid to such buckets. V 2. In an elastic fluid turbine, an element having a vane space acting to convert residual pressure into velocity, having its discharging end provided with a throat, and straight walls beyond the throat, and having anterior to the throat a curved portion of undiminished cross-sectional area from the receiving end. oi the space to the throat, substantially as set forth.

3. in an elastic iluidv turbine, an intermediate stationary element having a'vane space acting to convert residual pressure into w-looitv, having its discharging end pro- Vidod' with a throat, and straight walls beyond ho throat, and having anterior to the throat. a (curved portion ol nrnliininished rross-swlionul area l'roin the ror-eiving end o" the vane spar-o lolho throat, substantially as sol l'orl-h.

l. in an claslir lluid turbine, an element having a vane spzuo having paralhjel curved The throat front and rear walls-provided With a conto the discharging end of the vanespaee, substantially as set forth.

5. In an elastic fluid turbine, an intermediate stationary element having a va'ne space having arallel 'ourved: front and rear walls provided yond the'centerof the vane's'pace and extending in straight parallel lines to the discharging end of the vanespace: substantially as set forth.

6. In an elastic fluid, turbine, the combination with an ex ansion nozzle, of gnovable vanes receiving tie fluid from.the nozzle,

' componentQand another set with a? contracted throat be vrecewing the elastic fluid from the intermeeven-4a stationary intermediate vanes receiving the sfiaces each provided with a threat at its disc v arge end to convert the nent into velocity andadd it to the velocity of movable vanes diate vanes; substantially as setforth.

This specification signed and witnessed this 1st day of Deeeniber 190 CHARLES GQCURTIS. Witnesses:

JNO.'ROBT. TAYLOR, JOHN L. Lorsern pressure compov fluid from the movable vanes with a residual 

